... a conspicuous dearth of scholarly inquiry into the crack propagation mechanisms operative within high-carbonate shale matrices. This study endeavors to bridge this knowledge gap by undertaking a comprehensive investigation utilizing shale samples exhibiting varying carbonate concentrations through true triaxial...

... and characterize crack propagation, a new bond stretch failure criterion is also presented. The elastic deformation of a transverse isotropic plate with a hole and fracture propagation in a transverse isotropic rock under semi-circular bending (SCB) tests are simulated and compared to finite element method (FEM...

... ABSTRACT Considering the low computational efficiency and accuracy of peridynamics (PD), a concurrent multiscale method coupling PD and finite element method (FEM) is proposed for modeling crack propagation of brittle rock under compressive load. In the coupling method, the fracture behavior...

... investigation crack propagation wet system molecular dynamics simulation dynamic simulation propagation stress corrosion cracking crack growth reaction chemical reaction atom stress corrosion interaction ARMA 21 1758 Investigation of Stress Corrosion Cracking in rocks, a reactive molecular...

... ABSTRACT: For an efficient design in a hydraulic fracturing operation, reliable predictions of the applied pressure, and fracture initiation and propagation are important. In this paper, a hybrid bonded particle system and finite element domain is used to study the crack propagation around...

... & Gas dynamic fracture process analysis blast design method metals & mining electronic detonator crack propagation holmberg method damage zone buffer-row method application ARMA 19 0307 Dynamic Fracture Process Analysis of Controlled Blasts to Minimize the Excavation Damage Zone...

... the gravel or bypassing the gravel. At present, the researches on the cracks propagation modes in rock conglomerate are almost based on simplified models. The discussion on the impact of the real meso-structures of reservoir conglomerate has certain limitations. In this study, three-point bending experiments...

... of crack propagation. Several benchmark examples, including stress intensity factor calculation, steady-state heat conduction, transient heat conduction, and deformation induced by thermal stress, are provided to validate TOUGH-FEMM in dealing with thermo-mechanical problems with cracking. Additionally...

... of conventional hydraulic fracturing. Upstream Oil & Gas specimen hydraulic fracturing hydraulic pulse experiment stress wave experimental investigation MPa pulse time peak pressure single hydraulic pulse crack propagation hydraulic fracture reservoir permeability wellbore fracture...

... in the context of an interfacial damage model. This model predicts crack propagation at angles ±? ch = ±(45 - ?/2) relative to the direction of compressive load, where ? is the friction angle. By using appropriate models for fracture strength anisotropy, we demonstrate the interaction of rock weakest plane...

..., and many groups endeavored such task. We have previously presented (ARMA 17-1044) a finite elements model which rigorously accounted for the mechanics of crack propagation, with a fluid pressure field homogeneous across the fluid domain. In the present work, we extend the model to a coupled fluid-solid...

... ABSTRACT: Fiber-assisted diverting fracturing is an important stimulation technology when the formation has poor ability to produce complex fracture network. However, few investigations are focused on the influence of pore pressure on crack propagation in the process of fiber-assisted...

... the tertiary creep stage and average crack intensity of a specimen showed that the natural, pre-existing cracks and level of constant stress state dominates the time to reach failure of rock. Further, SEM analysis of thin sections of the shale specimen showed the cracks propagation along the grain boundaries...

... asperity geothermal reservoir Simulation temperature difference analytical model crack propagation propagation critical crack length crack length integrity evolution numerical result fracture hemisphere mechanics ARMA 18 343 The Effect of Radial Cracking on the Integrity of Asperity Under...

.... In the case of geothermal sites, the crack propagation occurs by fluid flow in either hydraulic fracturing or enhanced geothermal system (EGS) processes. Crack opening, length, and depth are the critical factors for the fluid flow rate. The fundamental difference between these two methods is the injection...

... and sends a shock wave in rock. Given the limitations of hydraulic fracturing technique, we study the effectiveness of a hybrid approach where initial perforations similar to those for hydraulic fracturing are used as seeds of crack propagation under dynamic loading. Finally for very high rates of loading...

... crack propagation ARMA 17-536 Analysis of the Mechanism of the Broken Rock by Using the Phase Change of Carbon Dioxide WeiBo. Sun. School of Energy Engineering, Xi an University of Science and Technology, Xi an , Shanxi, China Yan. Wang. School of Energy Engineering, Xi an University of Science...

... loading Reservoir Characterization Riemann solution effective stress model crack propagation traction Wellbore Design criterion damage model mohr-coulomb effective stress model mc effective stress model interface fracture ARMA 17-0679 Mixed-mode dynamic crack propagation in rocks...

... since it can perform arbitrary crack propagation without remeshing and elements containing a crack are not required to conform to crack edges. In this research XFEM is applied to investigate rock blasting based on the phantom node method where discontinuities in the displacement fields are introduced...

... Abstract: An improved understanding of rock bridge failure is a significant factor in future mining and geotechnical studies, particularly as open pits increase in depth. The progressive failure of rock bridges is an important process during damage development and brittle crack propagation...